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ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
PAGE 1 OF 32
OPERATIONS MONTHLY REPORT
May 2004
ERCOT System Operations
Kent Saathoff, Director Joel Mickey, Manager
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
PAGE 2 OF 32
Table of Contents
Grid Operation..................................................................................................................................3
Peak Demand...............................................................................................................................4
OOMC and RMR Activity............................................................................................................6
Transmission Congestion Management .................................................................................7
Local Congestion .......................................................................................................7
CSC Congestion........................................................................................................8
Notable Events ............................................................................................................................9
Market Operation............................................................................................................................11
Ancillary Services .....................................................................................................................11
Balancing Energy..............................................................................................................................15
Average Balancing Energy Deployed............................................................ 16
% of Total ERCOT Energy Requirement....................................................... 18
Average MCPE.............................................................................................. 20
Average Shadow Price................................................................................. 23
Cost Summary................................................................................................................................25
Ancillary Service Capacity Cost .................................................................... 26
Ancillary Service Deployment Cost ............................................................... 26
OOMC Cost................................................................................................... 27
Local Congestion Cost .................................................................................. 28
RMR Cost...................................................................................................... 29
Verified Actual RMR Cost.............................................................................. 30
Cost Summary .............................................................................................. 31
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
PAGE 3 OF 32
Grid Operation
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004 Daily Peak Demand
May 2004
0
10000
20000
30000
40000
50000
5/1
5/2
5/3
5/4
5/5
5/6
5/7
5/8
5/9
5/10
5/11
5/12
5/13
5/14
5/15
5/16
5/17
5/18
5/19
5/20
5/21
5/22
5/23
5/24
5/25
5/26
5/27
5/28
5/29
5/30
5/31
MW
Peak Demand for the Month: 5/31/04 17:00 48701
Monthly Peak DemandMay 2003 - May 2004
0
5000
10000
15000
20000
25000
30000
35000
40000
45000
50000
55000
60000
65000
May-03 Jun-03 Jul-03 Aug-03 Sep-03 Oct-03 Nov-03 Dec-03 Jan-04 Feb-04 Mar-04 Apr-04 May-04
MW
Note: Peak Demand is Peak Interval DemandPAGE 4 OF 32
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
PAGE 5 OF 32
30.0
35.0
40.0
45.0
50.0
55.0
60.0
65.0
70.0
75.0
80.0
85.0
90.05/
1
5/2
5/3
5/4
5/5
5/6
5/7
5/8
5/9
5/10
5/11
5/12
5/13
5/14
5/15
5/16
5/17
5/18
5/19
5/20
5/21
5/22
5/23
5/24
5/25
5/26
5/27
5/28
5/29
5/30
5/31
Houston North South West NorthEast
Trend of Temperature in Five Congestion Management Zones
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
PAGE 6 OF 32
OOMC and RMR Activity Relative Activity Capacity Purchases - OOMC & RMR
May 2004
29
0 0 0 0 0
17
0
39
57
31 31 2824
0
133
0
20
40
60
80
100
120
140
DFW
Eas
t Rio
Gra
nde
Lare
do A
rea
Cor
pus
Chr
isti
Are
a
Wes
t Rio
Gra
nde
San
Ang
elo
Are
a
Abi
lene
Are
a
Wes
tern
Are
a
Day
s
OOMC RMR
Note: 1 Unit-Day = 1 unit procured during any time period within one trade day.
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
PAGE 7 OF 32
Local Congestion Management
Total Number of Days of Local Congestion Management
13
11
87
54 4
2 2 2 2 2 2 2
0
5
10
15N
uece
s B
ay -
Whi
tepo
int
Alle
n Sw
itch
- Ben
Dav
is
Ode
ssa
- Big
Thr
ee
Polk
- H
all A
cres
Mar
tin L
ake
- Tric
orne
r
Step
henv
ille
- Lin
glev
ille
Mos
s Sw
itch
- Am
aco
N C
owde
n Ta
p
Cib
olo
- Sch
ertz
SMI -
McQ
ueen
ey
Trin
idad
- M
artin
Lak
e
N E
dinb
urg
- Moo
re F
ield
Cal
aver
as -
Bal
l Par
k
Ced
ar H
ill -
Wat
erm
ill
Cen
tral
Exp
ress
way
- K
irkla
nd P
ark
Day
s
Contingency Congestion Element Number of Days
Lon Hill - Whitepoint Nueces Bay - Whitepoint 13Allen Switch - Royse Switch/Monticello Allen Switch - Ben Davis 11N McAllen - N Edinburg Polk - Hall Acres 7Enterprise - Trinidad/Martin Lake Martin Lake - Tricorner 5Odessa Switch - Moss Moss Switch - Amaco N Cowden Tap 4Morgan Creek - Odessa Odessa - Big Three 4Midland East - Odessa Odessa - Big Three 4Benbrook -Parker/Graham Stephenville - Lingleville 4West Levee - Watermill Cedar Hill - Watermill 2N McAllen - N Edinburg N Edinburg - Moore Field 2Marion - Hill Country/Skyline Cibolo - Schertz 2Kirkland Park - North Haven Central Expressway - Kirkland Park 2Enterprise - Stryker Creek Trinidad - Martin Lake 2Clear Springs - Marion/Zorn SMI - McQueeney 2Calaveras- Skyline/Walzem Rd Calaveras - Ball Park 2
Note: 1 day= units procured during any time period within one trade day. Total numbers of 1 day or less of local congestion management are not shown in the graph. Occurrences of 1 day or less are not listed in table but are totaled in graph.
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
PAGE 8 OF 32
CSC Congestion Management
0
5
10
15
20
25
30
35
40
455/
1
5/2
5/3
5/4
5/5
5/6
5/7
5/8
5/9
5/10
5/11
5/12
5/13
5/14
5/15
5/16
5/17
5/18
5/19
5/20
5/21
5/22
5/23
5/24
5/25
5/26
5/27
5/28
5/29
5/30
5/31
EN SN NH SH WN
Num
ber o
f int
erva
ls
Instances of CSC congestion
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
PAGE 9 OF 32
Notable Events
New Procedures/ Forms/ Operations Bulletins Bulletin 82 Modified section 2.9 to include handling Inadvertent Payback (Frequency).
Bulletin 83 Updated the first bullet in section 3.5 Appendix 4 stating that during the months of April, May or October for hours that the forecasted load will be within 85% (was 80%) of forecasted peak load for the operating day the (Day Ahead).
Bulletin 84 Added new section 2.1.3 to address initial synchronization of new resources (Supervisor).
Bulletin 85 Revision for consistent process for OC1 changes needed to support outages. Also changed verbiage in section 2.2.1 from a constraint to a CSC (Transmission).
Bulletin 86 Clarification of section 2.5.3 “Operator Instructions for High Frequency” (Frequency).
Bulletin 87 Section 2.2.1 “Monitoring Outages” added back in procedure, existing 2.2.1 moved to new section 2.2.2 “OC1 Limits for Outage Support” (Transmission).
Bulletin 88 EECP Load Shed Table updated in the Operating Guides section 4.5.3.
Bulletin 89/90 Added new section 2.6.4 “Notification of Condition Termination” (Frequency & Transmission).
Bulletin 91 Verbiage modified in the first note under “Operator Instruction for High Frequency” concerning the Frequency Control Desk. Operator “must” was changed to operator “may” consult with the T&S desk to confirm that no OOMs from that desk could be affecting frequency (Frequency).
Bulletin 92 TC#228 extending TC#112 regarding interrupted outages due to computer software program unable to execute procedure.
Security Alert Stage/ Threatcon/ Related issues
Security Threat Alert Yellow (Elevated) maintained through May.
EECP Occurrence None
Major Weather Related Power System Problems None
Major system Voltage problems
None OCN, Advisory, Alert, Emergency Notice and Major Disturbances
5/01 10:11-14:00 OCN issued for severe weather in Houston Area 5/08 15:58 thru 5/09 2:04 Alert issued for 69kV Amoco to Terminal Switch
5/11 15:00-21:00 OCN issued in the Houston Zone for severe weather
5/12 10:23-12:00 Transmission Alert for Allen Sw-Shilo Rd 138 line.
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
PAGE 10 OF 32
5/19 15:30-22:00 Alert-Post Contingency loading on West Levee Auto #2.
5/27 15:30-24:00 Alert issued for North McAllen-North Edinburg
Significant Communication Problems
5/2 Held 01:00 interval. CSC Constraint activated when it should not have .
5/4 07:45-08:30 Portal not functioning 5/11 Held 18:15 interval . OOME and significant Resource Plan Changes caused a bad offset calculation
Major Computer System Problems/Fixes None
Load Shed incidences None
Update on New Generation
None
Max / Min Temperature Max: 101.5˚F FW Min: 39.5˚F FW
New SPS & RAP’s
None.
Other None
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
PAGE 11 OF 32
Market Operation
Ancillary Services
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004 Average Hourly Procurement by Ancillary Service
May 2004
0
100
200
300
400
500
600
700
800
900
1000
5/1
5/2
5/3
5/4
5/5
5/6
5/7
5/8
5/9
5/10
5/11
5/12
5/13
5/14
5/15
5/16
5/17
5/18
5/19
5/20
5/21
5/22
5/23
5/24
5/25
5/26
5/27
5/28
5/29
5/30
5/31
URS DRS RRS NSRS
M W
Average Hourly Procurement by Ancillary ServiceMay 2003 - May 2004
0
100
200
300
400
500
600
700
800
900
May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May
URS DRS RRS NSRS
M W
PAGE 12 OF 32
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004 Average MCPC by Ancillary Service
May 2004
$0
$4
$8
$12
$16
$20
5/1
5/2
5/3
5/4
5/5
5/6
5/7
5/8
5/9
5/10
5/11
5/12
5/13
5/14
5/15
5/16
5/17
5/18
5/19
5/20
5/21
5/22
5/23
5/24
5/25
5/26
5/27
5/28
5/29
5/30
5/31
URS DRS RRS NSRS
$/M
W
Average MCPC by Ancillary ServiceMay 2003 - May 2004
$0
$3
$6
$9
$12
$15
$18
May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May
URS DRS RRS NSRS
$/M
W
PAGE 13 OF 32
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004 Average Deployment by Ancillary Service
May 2004
0
20
40
60
80
100
120
140
160
180
200
220
2405/
1
5/2
5/3
5/4
5/5
5/6
5/7
5/8
5/9
5/10
5/11
5/12
5/13
5/14
5/15
5/16
5/17
5/18
5/19
5/20
5/21
5/22
5/23
5/24
5/25
5/26
5/27
5/28
5/29
5/30
5/31
URS DRS RRS NSRS
M W
Average Deployment by Ancillary ServiceMay 2003 - May 2004
0
20
40
60
80
100
120
140
160
180
200
May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May
URS DRS RRS NSRS
M W
PAGE 14 OF 32
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
PAGE 15 OF 32
Balancing Energy
Average Balancing Energy Deployed
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
0
100
200
300
400
500
600
700
800
900
1000
5/1
5/2
5/3
5/4
5/5
5/6
5/7
5/8
5/9
5/10
5/11
5/12
5/13
5/14
5/15
5/16
5/17
5/18
5/19
5/20
5/21
5/22
5/23
5/24
5/25
5/26
5/27
5/28
5/29
5/30
5/31
UBES_H UBES_N UBES_SUBES_W UBES_NE
M W
Average UBES Deployment in Five ZonesMay 2004
0
100
200
300
400
500
600
700
800
5/1
5/2
5/3
5/4
5/5
5/6
5/7
5/8
5/9
5/10
5/11
5/12
5/13
5/14
5/15
5/16
5/17
5/18
5/19
5/20
5/21
5/22
5/23
5/24
5/25
5/26
5/27
5/28
5/29
5/30
5/31
DBES_H DBES_N DBES_SDBES_W DBES_NE
Average DBES Deployment in Five ZonesMay 2004
MW
PAGE 16 OF 32
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
0
100
200
300
400
500
600
700
800
900
1000
May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May
UBES_H UBES_N UBES_SUBES_W UBES_NE
UBES Deployment: Rolling 12 Month RecordsMay 2003 - May 2004
MW
0
100
200
300
400
500
600
700
May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May
DBES_H DBES_N DBES_SDBES_W DBES_NE
DBES Deployment: Rolling 12 Month RecordsMay 2003 - May 2004
MW
PAGE 17 OF 32
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
PAGE 18 OF 32
Balancing Energy
% of Total ERCOT Energy Requirement
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
0%
1%
2%
3%
4%
5%
6%
7%5/
1
5/2
5/3
5/4
5/5
5/6
5/7
5/8
5/9
5/10
5/11
5/12
5/13
5/14
5/15
5/16
5/17
5/18
5/19
5/20
5/21
5/22
5/23
5/24
5/25
5/26
5/27
5/28
5/29
5/30
5/31
UBES % DBES %
Average BES Deployed: as A Percentage of Total Energy RequirementMay 2004
0%
1%
2%
3%
4%
5%
May-03 Jun-03 Jul-03 Aug-03 Sep-03 Oct-03 Nov-03 Dec-03 Jan-04 Feb-04 Mar-04 Apr-04 May-04
UBES DBES
Average BES Deployed: as A Percentage of Total Energy RequirementMay 2003 - May 2004
PAGE 19 OF 32
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
PAGE 20 OF 32
Balancing Energy
Average MCPE
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
0
10
20
30
40
50
60
705/
1
5/2
5/3
5/4
5/5
5/6
5/7
5/8
5/9
5/10
5/11
5/12
5/13
5/14
5/15
5/16
5/17
5/18
5/19
5/20
5/21
5/22
5/23
5/24
5/25
5/26
5/27
5/28
5/29
5/30
5/31
MCPE_H MCPE_N MCPE_SMCPE_W MCPE_NE
Average MCPE in Five ZonesMay 2004
$/M
Wh
10
20
30
40
50
60
70
80
0 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 72 76 80 84 88 92 96
MCPE_H MCPE_N MCPE_S
MCPE_W MCPE_NE
Average MCPE at Each Interval for Five ZonesMay 2004
Interval
$/M
W
PAGE 21 OF 32
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
0
5
10
15
20
25
30
35
40
45
50
May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May
MCPE_H MCPE_N MCPE_SMCPE_W MCPE_NE
MCPE: Rolling 12 Month RecordsMay 2003 - May 2004
$/M
W
Trend of Average Fuel Index
0
1
2
3
4
5
6
7
May-03 Jun-03 Jul-03 Aug-03 Aug-03 Sep-03 Oct-03 Nov-03 Dec-03 Dec-03 Jan-04 Feb-04 Mar-04 Apr-04 May-04PAGE 22 OF 32
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
PAGE 23 OF 32
Balancing Energy
Average Shadow Price
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
0
2
4
6
8
10
12
14
16
18
20
225/
1
5/2
5/3
5/4
5/5
5/6
5/7
5/8
5/9
5/10
5/11
5/12
5/13
5/14
5/15
5/16
5/17
5/18
5/19
5/20
5/21
5/22
5/23
5/24
5/25
5/26
5/27
5/28
5/29
5/30
5/31
NE NH SH SN WN
Average Shadow Price May 2004
$/M
W
PAGE 24 OF 32
0
1
2
3
4
5
6
7
8
9
10
May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May
NE NH SH SN WN
$/M
W
Average Shadow Price May 2003 - May 2004
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
PAGE 25 OF 32
Cost Summary
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
$-
$0.2
$0.4
$0.6
$0.8
$1.0
$1.2
$1.4
$1.6
5/1
5/2
5/3
5/4
5/5
5/6
5/7
5/8
5/9
5/10
5/11
5/12
5/13
5/14
5/15
5/16
5/17
5/18
5/19
5/20
5/21
5/22
5/23
5/24
5/25
5/26
5/27
5/28
5/29
5/30
5/31
Total: $27.47
Mill
ions
$
DRS URS RRS NSRS
Ancillary Service Capacity CostMay 2004
$(0.3)
$(0.2)
$(0.1)
$-
$0.1
$0.2
$0.3
$0.4
$0.5
$0.6
5/1
5/2
5/3
5/4
5/5
5/6
5/7
5/8
5/9
5/10
5/11
5/12
5/13
5/14
5/15
5/16
5/17
5/18
5/19
5/20
5/21
5/22
5/23
5/24
5/25
5/26
5/27
5/28
5/29
5/30
5/31
(Total w DRS: $ 1.90 Total w/o DRS: $5.47)
Mill
ion
$
DRS URS RRS NSRS
Ancillary Service Deployment CostMay 2004
PAGE 26 OF 32 Note: There is not a price for self-arranged Ancillary Services. MCPC is used to calculate the cost for self-arrangement.
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004 Estimated OOMC Cost At Final Settlement
May 2004
0.0
0.1
0.1
0.2
0.2
0.3
0.3
0.4
0.4
0.55/
1
5/2
5/3
5/4
5/5
5/6
5/7
5/8
5/9
5/10
5/11
5/12
5/13
5/14
5/15
5/16
5/17
5/18
5/19
5/20
5/21
5/22
5/23
5/24
5/25
5/26
5/27
5/28
5/29
5/30
5/31
Start-Up Payment (Total: $2.04 Million)Total OOMC Payment (Total: $6.11 Million)
Mill
ion
$
Note:
All OOMC’d units are paid Generic Start-Up Cost and Generic Operational Cost in Initial Settlement. The Start-Up payment for some units will be taken back in Final Settlement if those units did not have an actual startup.
OOMC Cost provided in this chart is an estimation because of the potential of disputes before Final Settlement. This chart will be updated after Final Settlement is completed.
PAGE 27 OF 32
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
PAGE 28 OF 32
0.0
0.1
0.2
0.3
0.4
0.5
0.65/
15/
25/
35/
45/
55/
65/
75/
85/
95/
105/
115/
125/
135/
145/
155/
165/
175/
185/
195/
205/
215/
225/
235/
245/
255/
265/
275/
285/
295/
305/
31
Total 6.10 Million
Local Congestion CostMay 2004
Mill
ion
$
DN Payment for Aggregated Units for Both Manual and LBE Deployment
UP Payment for Aggregated Units for Both Manual and LBE Deployment DN Payment for LBE Deployment without Market Solution
UP Payment for LBE Deployment without Market Solution
DN Payment for Manual OOME Deployment
UP Payment for Manual OOME Deployment DN Payment for LBE Deployment with Market Solution UP Payment for LBE Deployment with Market Solution
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
-1.0
-0.5
0.0
0.5
1.0
1.55/
1
5/2
5/3
5/4
5/5
5/6
5/7
5/8
5/9
5/10
5/11
5/12
5/13
5/14
5/15
5/16
5/17
5/18
5/19
5/20
5/21
5/22
5/23
5/24
5/25
5/26
5/27
5/28
5/29
5/30
5/31
Energy Stand ByStart Up BENA Credit
RMR Cost (Initial Settlement) May 2004
Mill
ion
$
PAGE 29 OF 32
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
5/1
5/2
5/3
5/4
5/5
5/6
5/7
5/8
5/9
5/10
5/11
5/12
5/13
5/14
5/15
5/16
5/17
5/18
5/19
5/20
5/21
5/22
5/23
5/24
5/25
5/26
5/27
5/28
5/29
5/30
5/31
Mill
ions
$
Net Cost $10.49
RMR Net Cost (Initial Settlement) May 2004
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
PAGE 30 OF 32
-15
-10
-5
0
5
10
15
20
25
Jan-
04
Feb-
04
Mar
-04
Apr
-04
Mill
ion
$
RMR Payments BENA Credit RMR Net Costs
Verified Actual RMR Cost (Final Settlement)
RMR Net Cost: $ 37.60
Note: 1. Trade dates 1/1/04 thru 4/24/04 complete with Final Resettlement data, using verifiable actual cost data provided by
the RMR Unit owner. 2. Trade date 4/25/04 thru 5/31/04 complete with Initial Resettlement data, using estimated eligible costs.
ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
-2
-1
0
1
2
3
4
55/
1/04
5/2/
04
5/3/
04
5/4/
04
5/5/
04
5/6/
04
5/7/
04
5/8/
04
5/9/
04
5/10
/04
5/11
/04
5/12
/04
5/13
/04
5/14
/04
5/15
/04
5/16
/04
5/17
/04
5/18
/04
5/19
/04
5/20
/04
5/21
/04
5/22
/04
5/23
/04
5/24
/04
5/25
/04
5/26
/04
5/27
/04
5/28
/04
5/29
/04
5/30
/04
5/31
/04
Mill
ions
$
DBES UBES LBES/OOMEOOMC RMR A/S
Cost Summary(Total w DBES: $ 72.12 Total w/o DBES: $ 87.88)
Note: 1. DBES cost is a credit to system costs and therefore is shown as a negative number here to differentiate it from the other types of Reliability Costs. 2. BES deployment costs include two parts: the cost for Power Balance and the cost for CSC Congestion. Due to Relaxed Balanced Schedule, the cost paid for Power Balance covers both the difference between ERCOT load forecast and QSE's schedule and the difference between QSE's Relaxed scheduled load and the load it would schedule should RBS were not allowed. The cost for Power Balance is not further divided accordingly because currently we do not have a way to differentiate these two types of Power Balance costs.
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ERCOT OPERATIONS MONTHLY REPORT – MAY 2004
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Please contact Shuye Teng at 512-248-3998 or email at [email protected] should you have any questions.